﻿using System;
using System.Threading;
using Microsoft.VisualStudio.TestTools.UnitTesting;

/* Copyright (c) 2010 CBaxter
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
 * IN THE SOFTWARE. 
 */

namespace Xpedite.Test
{
  [TestClass]
  public class AsynchronousCallWrapperTest
  {
    [TestMethod]
    public void TestSuccessWithSingleResultCall()
    {
      var asyncFunc = new AsynchronousCallWrapper<String>(() => "My Result");

      Assert.AreEqual("My Result", asyncFunc.Result);
    }

    [TestMethod]
    public void TestSuccessWithMultipleResultCall()
    {
      var asyncFunc = new AsynchronousCallWrapper<String>(() => "My Result");

      Assert.AreEqual("My Result", asyncFunc.Result);
      Assert.AreEqual("My Result", asyncFunc.Result);
      Assert.AreEqual("My Result", asyncFunc.Result);
    }

    [TestMethod]
    public void TestFailureWithSingleResultCall()
    {
      var ex = new Exception("My Exception");
      var asyncFunc = new AsynchronousCallWrapper<String>(() => { throw ex; });

      Expect.Exception(() => asyncFunc.Result, new XpediteException(ex.Message, ex));
    }

    [TestMethod]
    public void TestFailureWithMultipleResultCall()
    {
      var ex = new Exception("My Exception");
      var asyncFunc = new AsynchronousCallWrapper<String>(() => { throw ex; });

      Expect.Exception(() => asyncFunc.Result, new XpediteException(ex.Message, ex));
      Expect.Exception(() => asyncFunc.Result, new XpediteException(ex.Message, ex));
      Expect.Exception(() => asyncFunc.Result, new XpediteException(ex.Message, ex));
    }

    [TestMethod]
    public void TestBlockedResultCall()
    {
      var asyncFunc = new AsynchronousCallWrapper<String>(() =>
      {
        Thread.Sleep(110);
        return "My Result";
      });

      DateTime start = DateTime.Now;
      Assert.AreEqual("My Result", asyncFunc.Result);
      DateTime end = DateTime.Now;

      Assert.IsTrue(end.Subtract(start).TotalMilliseconds > 100);
    }
  }
}
